Dihydroergotamine Side Effects: What to Expect and When to Call Your Doctor

Dihydroergotamine (DHE) is one of the most effective medications for stopping a migraine attack in its tracks. But like all medications, it comes with side effects — some mild and manageable, others serious enough to require immediate medical attention.

Understanding what to expect can help you use DHE safely and know when something needs your doctor's attention versus when it's a normal part of treatment.

What Is Dihydroergotamine?

Dihydroergotamine is an ergot alkaloid used to treat acute migraine attacks and cluster headaches. It works by activating serotonin receptors in the brain, constricting dilated blood vessels and reducing the inflammation that causes migraine pain. It's available as an injection (IV, IM, or subcutaneous), nasal sprays (Migranal and Trudhesa), a nasal powder (Atzumi), and a subcutaneous injection (Brekiya). For a complete overview, see our guide on what Dihydroergotamine is and how it's used.

Common Side Effects of Dihydroergotamine

These side effects are relatively common and usually mild. They often improve as your body adjusts to the medication or resolve on their own after treatment:

• Nausea and vomiting — This is the most commonly reported side effect across all formulations. It can be particularly noticeable with IV administration. Your doctor may prescribe an anti-nausea medication (like ondansetron or metoclopramide) to take alongside DHE.
• Nasal irritation and congestion (rhinitis) — Very common with the nasal spray formulations (Migranal, Trudhesa, Atzumi). You may experience a stuffy nose, runny nose, or sneezing after administration.
• Altered or unusual taste — A strange or bitter taste in the mouth is common with nasal formulations. It usually goes away within an hour or so.
• Dizziness — Some people feel lightheaded or dizzy after taking DHE. Avoid driving or operating heavy machinery until you know how the medication affects you.
• Diarrhea — Gastrointestinal effects beyond nausea can include diarrhea and stomach cramps.
• Injection site reactions — Redness, pain, or swelling at the injection site is common with the injectable forms (including Brekiya).
• Sore throat — Mild throat irritation can occur with nasal spray formulations as the medication drips into the back of the throat.

Serious Side Effects — When to Call Your Doctor

These side effects are less common but potentially dangerous. If you experience any of them, contact your doctor right away — or call 911 if symptoms are severe.

Peripheral Ischemia (Reduced Blood Flow to Extremities)

This is the most important serious risk associated with Dihydroergotamine and is highlighted in the drug's FDA boxed warning. Because DHE constricts blood vessels, it can reduce blood flow to your fingers, toes, and other extremities. Warning signs include:

• Tingling, numbness, or pins-and-needles in fingers or toes
• Cold, pale, or bluish-colored hands or feet
• Pain or cramping in your arms or legs
• Muscle weakness in the extremities

The risk is especially high when DHE is taken with strong CYP3A4 inhibitors — certain antifungal medications, antibiotics, and HIV medications. This combination is contraindicated (meaning you should never take them together).

Coronary Artery Vasospasm

DHE can cause spasm of the coronary arteries, leading to reduced blood flow to the heart. Seek immediate medical help if you experience:

• Chest pain, tightness, or pressure
• Shortness of breath
• Pain radiating to the jaw, neck, or arm

Cerebral Ischemia

In rare cases, DHE can reduce blood flow to the brain, producing stroke-like symptoms. Call 911 immediately if you experience sudden severe headache (different from your migraine), vision changes, difficulty speaking, confusion, or one-sided weakness.

Severe Hypertension

DHE can raise blood pressure significantly. If you experience a sudden severe headache (different from migraine), blurred vision, or nosebleeds, check your blood pressure and contact your doctor.

Fibrosis With Prolonged Use

Long-term or frequent use of ergot alkaloids (including DHE) has been associated with fibrosis — abnormal thickening of tissue in the heart valves, lungs, or the tissue behind the abdominal organs (retroperitoneal fibrosis). This is rare with typical acute-use dosing but is a concern with chronic overuse.

Medication Overuse Headache

Ironically, using DHE too frequently can make headaches worse. Medication overuse headache (MOH) can develop if you use DHE more than 10 days per month. If your migraines seem to be getting more frequent, talk to your doctor — you may need a different treatment approach.

Side Effects by Formulation

The side effects you're most likely to experience depend partly on which form of Dihydroergotamine you use:

• Injectable (IV/IM/SC): Nausea and vomiting are most common. Injection site reactions with IM/SC. IV administration in a clinic allows for monitoring and anti-nausea premedication.
• Migranal nasal spray: Rhinitis, altered taste, and nasal discomfort are the most frequently reported side effects.
• Trudhesa (POD nasal spray): Similar nasal side effects but potentially less drainage to the throat due to the precision delivery system.
• Atzumi (nasal powder): Nasal irritation and sneezing may be more pronounced with the powder formulation.
• Brekiya (SC injection): Injection site reactions are common. Nausea is also frequently reported.

Who Is at Higher Risk for Side Effects?

Certain groups of people face greater risks with Dihydroergotamine:

• People with heart or vascular disease: DHE is contraindicated in people with ischemic heart disease, coronary artery vasospasm (Prinzmetal angina), peripheral arterial disease, or uncontrolled high blood pressure.
• Pregnant or breastfeeding women: Dihydroergotamine is contraindicated in pregnancy — it may cause harm to the developing baby. It should also not be used while breastfeeding.
• People with liver or kidney disease: Severely impaired liver or kidney function is a contraindication because the body may not be able to process and eliminate DHE safely.
• Elderly patients: Older adults may be more sensitive to the vasoconstrictive effects and should be monitored more closely.
• Smokers: Nicotine enhances blood vessel constriction, which can increase the risk of peripheral ischemia when combined with DHE.

How to Manage Common Side Effects

If you experience mild side effects, here are some practical tips:

• For nausea: Ask your doctor about taking an anti-nausea medication before your DHE dose. Eating a small bland snack beforehand may also help. Stay hydrated.
• For nasal irritation: Use saline nasal spray between doses to keep nasal passages moist. Avoid blowing your nose for at least 15 minutes after using a nasal formulation.
• For altered taste: Rinse your mouth with water or suck on a mint after nasal spray administration. This usually resolves within an hour.
• For dizziness: Sit or lie down until the dizziness passes. Don't drive or do anything that requires sharp focus until you feel steady.
• For injection site reactions: Apply a cold compress to reduce swelling. Rotate injection sites with each dose.

When to Call Your Doctor — A Quick Summary

Call your doctor if you experience:

• Numbness, tingling, or coldness in your fingers or toes
• Muscle pain or weakness in your arms or legs
• Changes in skin color (pale or blue fingers/toes)
• Headaches that are getting more frequent (possible medication overuse headache)

Call 911 or go to the ER if you experience:

• Chest pain, tightness, or pressure
• Shortness of breath
• Sudden severe headache unlike your usual migraine
• Difficulty speaking, sudden vision changes, or one-sided weakness
• Signs of a severe allergic reaction (hives, swelling of face/throat, difficulty breathing)

Final Thoughts

Dihydroergotamine is a powerful migraine treatment, and for many patients it's a lifeline when other medications fail. The common side effects — nausea, nasal irritation, dizziness — are usually manageable. The serious risks — peripheral ischemia, heart-related symptoms — are rare but important to recognize. Make sure your doctor knows your full medical history and every medication you take. For more on what to watch out for, read our guide to Dihydroergotamine drug interactions.

If you're having trouble finding Dihydroergotamine at your pharmacy, Medfinder can help you locate pharmacies with DHE in stock.